#include <vtkSphereSource.h>
#include <vtkSmartPointer.h>
#include <vtkPolyData.h>
#include <vtkXMLPolyDataReader.h>

int main(int argc, char *argv[])
{
  vtkSmartPointer<vtkPolyData> polyData =
    vtkSmartPointer<vtkPolyData>::New();

  if (argc > 1)
    {
    vtkSmartPointer<vtkXMLPolyDataReader> reader =
      vtkSmartPointer<vtkXMLPolyDataReader>::New();
    reader->SetFileName ( argv[1] );
    reader->Update();
    polyData = reader->GetOutput();
    }
  else
    {
    vtkSmartPointer<vtkSphereSource> modelSource =
      vtkSmartPointer<vtkSphereSource>::New();
    modelSource->Update();
    polyData = modelSource->GetOutput();
    }

  double bounds[6];
  polyData->GetBounds(bounds);
 
  std::cout  << "xmin: " << bounds[0] << " " 
             << "xmax: " << bounds[1] << std::endl
             << "ymin: " << bounds[2] << " " 
             << "ymax: " << bounds[3] << std::endl
             << "zmin: " << bounds[4] << " " 
             << "zmax: " << bounds[5] << std::endl;
 
  return EXIT_SUCCESS;
}
